Deploying with GitHub Actions

Introduction

GitHub Actions offers features that let you control deployments. You can:

• Trigger workflows with a variety of events.
• Configure environments to set rules before a job can proceed and to limit access to secrets.
• Use concurrency to control the number of deployments running at a time.

For more information about continuous deployment, see "About continuous deployment."

Prerequisites

You should be familiar with the syntax for GitHub Actions. For more information, see "Learn GitHub Actions."

Triggering your deployment

You can use a variety of events to trigger your deployment workflow. Some of the most common are: pull_request, push, release, and workflow_dispatch.

For example, a workflow with the following triggers runs whenever:

• There is a push to the main branch.
• A pull request targeting the main branch is opened, synchronized, or reopened.
• A release is created.
• Someone manually triggers it.

on:
  push:
    branches:
      - main
  pull_request:
    branches:
      - main
  release:
    types:
      - created
  workflow_dispatch:

For more information, see "Events that trigger workflows."

Using environments

Environments are used to describe a general deployment target like production, staging, or development. When a GitHub Actions workflow deploys to an environment, the environment is displayed on the main page of the repository. You can use environments to require approval for a job to proceed, restrict which branches can trigger a workflow, or limit access to secrets. For more information about creating environments, see "Using environments for deployment."

Using concurrency

Concurrency ensures that only a single job or workflow using the same concurrency group will run at a time. You can use concurrency so that an environment has a maximum of one deployment in progress and one deployment pending at a time.

For example, when the following workflow runs, it will be paused with the status pending if any job or workflow that uses the production concurrency group is in progress. It will also cancel any job or workflow that uses the production concurrency group and has the status pending. This means that there will be a maximum of one running and one pending job or workflow in that uses the production concurrency group.

name: Deployment

concurrency: production

on:
  push:
    branches:
      - main

jobs:
  deployment:
    runs-on: ubuntu-latest
    environment: production
    steps:
      - name: deploy
        # ...deployment-specific steps

You can also specify concurrency at the job level. This will allow other jobs in the workflow to proceed even if the concurrent job is pending.

name: Deployment

on:
  push:
    branches:
      - main

jobs:
  deployment:
    runs-on: ubuntu-latest
    environment: production
    concurrency: production
    steps:
      - name: deploy
        # ...deployment-specific steps

You can also use cancel-in-progress to cancel any currently running job or workflow in the same concurrency group.

name: Deployment

concurrency: 
  group: production
  cancel-in-progress: true

on:
  push:
    branches:
      - main

jobs:
  deployment:
    runs-on: ubuntu-latest
    environment: production
    steps:
      - name: deploy
        # ...deployment-specific steps

Viewing deployment history

When a GitHub Actions workflow deploys to an environment, the environment is displayed on the main page of the repository. For more information about viewing deployments to environments, see "Viewing deployment history."

Monitoring workflow runs

Every workflow run generates a real-time graph that illustrates the run progress. You can use this graph to monitor and debug deployments. For more information see, "Using the visualization graph."

You can also view the logs of each workflow run and the history of workflow runs. For more information, see "Viewing workflow run history."

Tracking deployments through apps

If your GitHub personal account or organization is integrated with Microsoft Teams or Slack, you can track deployments that use environments through Microsoft Teams or Slack. For example, you can receive notifications through the app when a deployment is pending approval, when a deployment is approved, or when the deployment status changes. For more information about integrating Microsoft Teams or Slack, see "GitHub extensions and integrations."

You can also build an app that uses deployment and deployment status webhooks to track deployments. When a workflow job that references an environment runs, it creates a deployment object with the environment property set to the name of your environment. As the workflow progresses, it also creates deployment status objects with the environment property set to the name of your environment, the environment_url property set to the URL for environment (if specified in the workflow), and the state property set to the status of the job. For more information, see "Apps" and "Webhook events and payloads."

Choosing a runner

You can run your deployment workflow on GitHub-hosted runners or on self-hosted runners. Traffic from GitHub-hosted runners can come from a wide range of network addresses. If you are deploying to an internal environment and your company restricts external traffic into private networks, GitHub Actions workflows running on GitHub-hosted runners may not be communicate with your internal services or resources. To overcome this, you can host your own runners. For more information, see "About self-hosted runners" and "About GitHub-hosted runners."

Displaying a status badge

You can use a status badge to display the status of your deployment workflow. Um selo de status mostra se um fluxo de trabalho está falhando ou passando. Um lugar comum para adicionar um selo de status é o arquivo README.md do seu repositório, mas você pode adicioná-lo a qualquer página da web que desejar. Por padrão, os selos exibem o status do seu branch-padrão. Também é possível exibir o status de uma execução de fluxo de trabalho para um branch ou evento específico usando os parâmetros de consulta do branch e evento na URL.

For more information, see "Adding a workflow status badge."

Next steps

This article demonstrated features of GitHub Actions that you can add to your deployment workflows.

GitHub offers CD workflow templates for several popular services, such as Azure Web App. To learn how to get started using a workflow template, see "Using workflow templates" or browse the full list of deployment workflow templates. You can also check out our more detailed guides for specific deployment workflows, such as "Deploying to Azure App Service."

Many service providers also offer actions on GitHub Marketplace for deploying to their service. For the full list, see GitHub Marketplace.